[Bug bootstrap/58340] [4.9 regression] gcc/cp/pt.c:7064:1: internal compiler error: in propagate_threaded_block_debug_into, at tree-ssa-threadedge.c:623

[law at redhat dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58340

--- Comment #11 from Jeffrey A. Law <law at redhat dot com> ---
I've found a minor error in the tree-ssa-threadedge.c changes.  I can easily
see how it affects Zhengong's testcase and I can speculate how it might be
triggering the ia64 failure.

I'm testing it on x86_64-unknown-linux-gnu at the moment.  I'll spin up a test
on ia64 at some point over the weekend as well.